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13 Geochemical Data and Analysis <br /> The mill is currently being commissioned and tailings are being analyzed as required by TR-15. <br /> Tailings are hauled to a temporary storage area, sampled for reagent content and tested using the <br /> Synthetic Precipitation Leaching Procedure (SPLP) and Toxic Characteristic Leachate Procedure <br /> (TCLP), which are the recommended procedures for evaluating whether waste rock and tailings <br /> have the potential to impact groundwater or surface water. <br /> Waste rock is tested on a routine basis per TR-09 for leachability to confirm it is suitable for use as <br /> road base in offsite locations. Tailings are tested on a quarterly basis. Copies of the most recent <br /> analysis of wase rock is provided in Appendix 7. Tailings analysis are provided to DRMS in regular <br /> reports. <br /> M-2012-032 <br /> Amendment 02 Exhibit U <br /> December 2021 U-29 <br />